Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11447682 | Water-soluble or water-swellable polymers as water loss reducers in cement slurries | Dirk Fischer, Christoph Kayser, Claudia Diemel, Michael Gayle Schafer | 2022-09-20 |
| 5510436 | Water-soluble copolymers useful in drilling fluids | Martin Hille, Heinz Wittkus, Fritz Engelhardt, Ulrich Riegel | 1996-04-23 |